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129
Spraying and Cleansing Floors of London County Council
Schools with Electrolytic Disinfecting Fluid.
A total 1,224 gallons were supplied to four London County Council
Public Elementary Schools for spraying and cleansing floors of class
rooms.
Swimming Baths, the use therein of the Electrolytic Fluid.
The fluid continues to be added to the water in the swimming baths
in the same quantity and strength as mentioned in the Annual Report for
the year 1909, viz., 1 part of Chlorine to 2,000,000 parts of water. 9,340
gallons were supplied to the Poplar Baths, 9,043 gallons to the Bow Baths
and 2,800 gallons to the Island Baths, making a total of 21,183 gallons.
The Baths Superintendents repeat their statements that the addition
of the fluid prevents the formation of slime in the water, the slime is not
found at the bottom of the baths when they are emptied, and there is no
offensive smell when the baths are being cleansed.
It should be said that the electrolytic fluid in the Poplar Baths is
not used with the idea of rendering unnecessary periodic changes of the
pond water, but to keep the water in the pond fresh and free from harmful
organisms all the time it is in use. The class of persons who use the
swimming ponds in Poplar is always likely to contain uncleanly or infected
individuals, and it is to guard against danger from the latter that the
fluid finds its chief application.
At Poplar the electrolytic fluid costs in its preparation about £2 per
1,000 gallons, or a little less than ½d. per gallon. Thirty gallons are
added to a swimming pond of 85,000 gallons capacity on first filling,
and subsequent additions are made as required, at intervals of two or
three days.
Comments on Adverse Criticisms respecting the process.
See annual report, 1911.
At Poplar, the hypochlorite of magnesia solution is prepared by
the electrolysis of Water Board water, containing certain definite proportions
of sodium chloride and magnesium chloride.